摘要:
Process for preparing a lipophilic oligosaccharide antibiotic containing a nitro group using oxidizing agents and catalysts such as cobalt, manganese and copper having an oxidation state of +2 are disclosed.
摘要:
Orthosomycins have been isolated from the fermentation broth of the microorganism Micromonospora Carbonacea var Africana designated SCC 2146. These compounds are antibacterial agents. Compositions and methods for treating bacterial infections are also described.
摘要翻译:已经从微生物Micromonospora Carbonacea var Africana指定为SCC 2146的发酵液中分离出了直链霉菌素。这些化合物是抗菌剂。 还描述了治疗细菌感染的组合物和方法。
摘要:
A novel, stable, crystalline sodium (5R,6S,8R)-6-(1-hydroxyethyl)-2-(2-carbamoyloxyethylthio)-penem-3-carboxylate (designated as Form II) is prepared by forming a homogenous solution of sodium (5R,6S,8R)-6-(1-hydroxyethyl)-2-(2-carbamoyloxyethylthio)-penem-3-carboxylate combined with stirring the homogenous solution for a time and at a temperature sufficient to produce Form II and recovering Form II. Form II may also be prepared by contacting a first solution obtained by dissolving (5R,6S,8R)-6-(1-hydroxyethyl)-2-(2-carbamoyloxyethylthio)-penem-3-carboxylic acid in dimethylacetamide with a second solution obtained by dissolving a sodium salt of an organic acid having a pKa of up to about 5, e.g., sodium 2-ethylhexanoate in acetone, in the presence of at least 5 volume percent water while stirring the reaction mixture so formed at a temperature and for a time sufficient to produce Form II followed by recovering Form II.Form II exhibits a greater physical stability and increased solid state chemical stability and reduced hygroscopicity over that of the amorphous form (e.g., Form I) which renders Form II greatly superior to Form I as a clinically suitable antibacterial agent.